/*
 * Copyright (c) 2019, 2020, Oracle and/or its affiliates.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

struct Point {
    int x;
    int y;
};

struct Line {
    struct Point start;
    struct Point end;
};

void printPoint(struct Point *p) {
    printf("Point: x=%i, y=%i", p->x, p->y);
}

// on some platforms sqrt is a macro or an intrinsic
// define a new function here so we can call it reliably from the debugger
double mySqrt(double value) {
    return sqrt(value);
}

double getLineLength(struct Line *l) {
    int difX = l->end.x - l->start.x;
    int difY = l->end.y - l->start.y;
    return sqrt(difX * difX + difY * difY);
}

__attribute__((constructor)) int main() {
    struct Point p;
    p.x = 3;
    p.y = 4;
    struct Line line;
    line.start = p;
    line.end.x = 6;
    line.end.y = 0;
    line.start.x = p.x;
    double len = getLineLength(&line);
    __builtin_debugtrap();
    printPoint(&p);
    printf("Length of line: %f", len);
    return 0;
}
